APA (7th ed.) Citation

Gass, S. M., & Mackey, A. (2012). Research methods in second language acquisition: A practical guide. Wiley-Blackwell. https://doi.org/10.1002/9781444347340

Chicago Style (17th ed.) Citation

Gass, Susan M., and Alison Mackey. Research Methods in Second Language Acquisition: A Practical Guide. Chichester, West Sussex, U.K. ; Malden, Mass.: Wiley-Blackwell, 2012. https://doi.org/10.1002/9781444347340.

MLA (9th ed.) Citation

Gass, Susan M., and Alison Mackey. Research Methods in Second Language Acquisition: A Practical Guide. Wiley-Blackwell, 2012. https://doi.org/10.1002/9781444347340.